public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_ebook);

    //webview use to call own site
    webview =(WebView)findViewById(R.id.webView);

    webview.setWebViewClient(new WebViewClient());          
    webview .getSettings().setJavaScriptEnabled(true);
    webview .getSettings().setDomStorageEnabled(true);      
    webview.loadUrl("http://www.google.com"); 
}

and your entire main.xml(res/layout) look should like this:

<WebView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/webView" android:layout_width="fill_parent" android:layout_height="fill_parent" />